n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 24 |
5 | 188 |
6 | 1480 |
7 | 14824 |
8 | 182784 |
9 | 2495632 |
10 | 37988128 |
11 | 649646336 |
12 | 12226037120 |
13 | 250202750016 |
14 | 5549572352896 |
15 | 132663174885760 |
16 | 3396998634659840 |
17 | 92768709569362176 |
18 | 2691992696956801536 |
[0,1,2,4,24,188,1480,14824,182784,2495632, 37988128,649646336,12226037120,250202750016, 5549572352896,132663174885760,3396998634659840, 92768709569362176,2691992696956801536] |